When you ask "What number is halfway between 70 and 771?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=70 and Y=771.
To find the number halfway between 70 and 771, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 771 into our formula, we get:
(70 + 771)/2 = 420.5
Thus, the number halfway between 70 and 771 is 420.5.
To check that our answer is correct, we subtract 70 from 420.5 and subtract 420.5 from 771 and compare the two numbers:
420.5 - 70 = 350.5
771 - 420.5 = 350.5
As you can see, the halfway number is 350.5 higher than 70 and 350.5 lower than 771. Therefore, our halfway between answer of 420.5 above is correct.
Halfway Between
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Halfway Between 70 and 772
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